I wonder how difficult and expensive it would be to modify the stadium to what Arizona is doing? In looking at pictures of the stadium, it appears to me visually it could be accomplished.

I think it would be incredibly expensive, if not impossible. You'd have to redesign and reconstruct supporting structures for one end zone's stands and roof.

They will go to field turf 10 times over before the even consider that solution.

As someone already pointed out, players want to play on grass, and how "bad" the field looks to us makes no difference. Heard ND Kalu on the radio earlier in the week discussing this, and he said he had no problem with the Texans field when he played here. He said it was a little harder than other natural grass fields, but much better than any artificial turf he played on.